There are/have been at least 7 artists with this name:
These are photos from concerts where Everest played, so they may be of other bands that played the concert as well.
Bumbershoot 2009 Sep 5 - 7, 2009 Seattle, Washington, United States Uploaded by Deadcow13
Band of Horses / Everest / The Drones / A Decent Animal Apr 17, 2009 Oakland, California, United States Uploaded by Dearanxiety
Neil Young / Wilco / Everest Dec 16, 2008 New York, New York, United States Uploaded by Itrainmonkeys